public int count8(int n) {
  if(n == 0) return 0;
  if(n == 8) return 1;
  if(n % 10 == 8 && n / 10 % 10 != 8) return 1 + count8(n/10);
  if(n % 10 == 8 && n / 10 % 10 == 8) return 2 + count8(n/10);
  return 0 + count8(n/10);

}